public void Attach(DataGrid grid)
{
var keydown = Observable.FromEventPattern <KeyEventArgs>(grid, "KeyDown");
var textInput = Observable.FromEventPattern <TextCompositionEventArgs>(grid, "TextInput");
var lastEdit = DateTime.MinValue;
var edit = textInput
.Where(e => NullableConvert.ToUInt32(e.EventArgs.Text) != null && grid.SelectedItem != null)
.Do(e => e.EventArgs.Handled = true)
.Select(e => new Func <string, string>(v => {
var text = e.EventArgs.Text;
var now = DateTime.Now;
if ((now - lastEdit) > inputInterval)
{
return(text);
}
else
{
return(v + text);
}
}));
var backspace = keydown.Where(e => e.EventArgs.Key == Key.Back && grid.SelectedItem != null)
.Do(e => e.EventArgs.Handled = true)
.Select(e => new Func <string, string>(v => v.Slice(0, -2)));
var delete = keydown.Where(e => e.EventArgs.Key == Key.Delete && grid.SelectedItem != null)
.Do(e => e.EventArgs.Handled = true)
.Select(e => new Func <string, string>(v => ""));
var updated = edit.Merge(backspace).Merge(delete);
updated.Subscribe(a => {
UpdateValue(grid, a);
lastEdit = DateTime.Now;
});
//игнорировать события до тех пор пока не произошло событие редактирования
//когда произошло взять одно событие и повторить, фактически это state machine
//которая генерирует событие OfferCommitted только если было событие редактирования
updated.Throttle(commitInterval, scheduler)
.Merge(Observable.FromEventPattern <EventArgs>(grid, "CurrentCellChanged").Select(e => e.Sender))
.Merge(Observable.FromEventPattern <RoutedEventArgs>(grid, "Unloaded").Select(e => e.Sender))
.SkipUntil(updated)
.Take(1)
.Repeat()
.ObserveOn(scheduler)
.Subscribe(e => {
lastEdit = DateTime.MinValue;
var editor = GetEditor(grid);
if (editor != null)
{
editor.Committed();
}
else
{
ViewModelHelper.InvokeDataContext(grid, "OfferCommitted");
}
});
}
public void Invoke_with_anonymous_object()
{
var param = new { Method = "Test" };
var args = (ExecutedRoutedEventArgs)typeof(ExecutedRoutedEventArgs)
.GetConstructor(BindingFlags.NonPublic | BindingFlags.Instance, null, new[] { typeof(ICommand), typeof(object) }, null)
.Invoke(new object[] { new RoutedUICommand(), param });
var result = ViewModelHelper.InvokeDataContext(element, args);
Assert.AreEqual(1, model.Count);
}
private void UpdateValue(object sender, Func <string, string> value)
{
var dataGrid = (DataGrid)sender;
var item = dataGrid.SelectedItem as IInlineEditable;
if (item == null)
{
return;
}
item.Value = SafeConvert.ToUInt32(value(item.Value == 0 ? "" : item.Value.ToString()));
var editor = GetEditor(dataGrid);
if (editor != null)
{
editor.Updated();
}
else
{
ViewModelHelper.InvokeDataContext(dataGrid, "OfferUpdated");
}
}
private void Open(object sender, RoutedEventArgs e)
{
ViewModelHelper.InvokeDataContext(this, "Open", ((FrameworkContentElement)sender).DataContext);
}
public void Invoke_view_model()
{
ViewModelHelper.InvokeDataContext(element, "Test", EventArgs.Empty);
Assert.AreEqual(1, model.Count);
}
public void Return_result()
{
var result = ViewModelHelper.InvokeDataContext(element, "CanTest");
Assert.That(result, Is.EqualTo(false));
}
public void Invoke_result()
{
ViewModelHelper.InvokeDataContext(element, "Test");
Assert.That(model.Count, Is.EqualTo(1));
}
